Word: th
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...WHEELER, 1284 Massachusetts Ave.24 tu th...
...rays will go through sheets of aluminum 1-10 of an inch thick; a greater thickness of aluminum will absorb only a portion of the rays. The glass of the Crooke's tube is only 1-60th of an inch thick, but even glass as thin as this absorbs so many rays that it presents great obstacles. It has been suggested that an aluminum window be put in the tube and that the photographs be taken with the rays that come through the aluminum, for the reason that the aluminum absorbs hardly any rays while the thinnest glass absorbs...
...SARGENT, 49 Matthews.t th...
...SARGENT, 49 Matthews.t th...
...MILLER, A. B., 3 Warland Block, 1278 Mass. Ave. At my room from 2 to 3.w th...